Abstract
A shaking table experiment for the piping system with a friction support has been conducted to investigate the reduction characteristics of vibration responses of the piping system due to frictional effect against earthquake type excitations. The piping system has been so designed that the contact point of the piping moves in-plane 2 dimensional motion on the teflon bearing plate supported by the shaking table. The experimental results were well explained by a proposed deterministic approximate modal analysis theory which were already reported in the separate paper. Here, we try to evaluate the seismic responses by means of the non-deterministic method, i. e. the statistical equivalent linearization method, for friction forces at the friction support of the piping. It has been found that the calculated responses by the linearization method show in good agreement with the experimental ones. The equivalent modal damping is also estimated in this process. From the above results, seismic performance of the frictional effect is discussed.
